MY Series (10kVA-40kVA) UPS
User Manual
2 Overview
19
automatically when open the maintenance bypass cover, then switch on the maintenance bypass
breaker and switch off the mains input breaker and bypass input breaker, output breaker. During the
transforming of manual maintenance bypass, AC power is supplied for load by maintenance bypass
breaker. At this time, the inner UPS has no electricity, maintainer can perform the maintenance safely.
AC
DC
DC
AC
Bypass input
Mains input
Battery input
Bypass static switch
Charger
Rectification
Inverter
Maintenance bypass
Output
DC
DC
Discharger
Figure2-15
Maintenance bypass power supply mode (the thick solid line stands for the energy flow
direction)
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